SERGEYCHUK, V. V. On subgroups lifting modulo central commutant. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 5, p. 742–745, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4914. Acesso em: 14 apr. 2025.